Default Folder X 4.3.3 is available on the What’s New page, addressing a couple of fairly major issues on Leopard and Tiger. My apologies for the need for another update so close on the heels of version 4.3.2 – see my earlier blog post about LSSharedFileListAddObserver for the gory details.
To just download the new version, use the link below:
And yes, I’m aware that this would be easier for you if DFX auto-updated using Sparkle. It’s on my list, but the last couple of releases have had significant fixes that I haven’t wanted to hold up with the oodles of testing necessary to roll out a new update mechanism.